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| 020 |
_aNCST _c9.95 |
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| 040 | _aMAIN | ||
| 082 | _a335 | ||
| 100 |
_aRONAYNE,JOHN _936834 |
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| 245 | 0 | _aINTRODUCTION TO DIGITAL COMMUNICATIONS SWITCHING | |
| 250 | _a1 | ||
| 260 |
_bPITMA _c1986 _aLONDON |
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| 300 | _b212 | ||
| 942 | _cBK | ||
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_c43696 _d43696 |
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